Mask



FIG. 1 is a perspective view of a mask according to our design, with a patient shown in phantom and indicating the optimum positioning of the mask assembly on the patient;

FIG. 2 is another perspective view of the mask shown in FIG. 1 in use on a patient;

FIG. 3 is a front view of the mask shown in FIG. 1, with the phantomed air delivery tube and the phantomed tube retainer shown removed for ease of illustration, and in a condition in which the positions of the swivel elbow and plug have been interchanged;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

Where included, broken lines showing environment or structure are for illustrative purposes only and form no part of the claimed design.

The use of stippling, e.g., see FIGS. 1-8, is used to indicate shading and forms no part of the claimed design. 

The ornamental appearance of a mask, as shown. 